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Tandem Diabetes Care Inc

TNDM
Exchange
Nasdaq
Industry
Surgical & Medical Instruments & Apparatus
SEC CIK
0001438133

No open-market purchases or sales by Tandem Diabetes Care Inc insiders were filed in the last 90 days; 274 institutions reported holding it in 13F filings for Q2 2026, worth $1.19B in total; no superinvestor holds it.

13F holders, Q1 2022

Institutional positions in Tandem Diabetes Care Inc as of Mar 31, 2022. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
379
−4 vs. Q4 2021
Shares held
59.5M
−891.8K (−1.5%) vs. Q4 2021
Total value
$6.92B
−$2.17B (−23.8%) vs. Q4 2021
New holders
62
153 more added
Sold out
66
119 more reduced

5 institutions that held it in Q4 2021 haven't filed for Q1 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q4 2021: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting TNDM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2022: 379 institutions
Q1 2021: 290 institutionsQ2 2021: 303 institutionsQ3 2021: 338 institutionsQ4 2021: 388 institutionsQ1 2022: 379 institutionsQ2 2022: 331 institutionsQ3 2022: 299 institutionsQ4 2022: 295 institutionsQ1 2023: 274 institutionsQ2 2023: 247 institutionsQ3 2023: 226 institutionsQ4 2023: 268 institutionsQ1 2024: 291 institutionsQ2 2024: 317 institutionsQ3 2024: 332 institutionsQ4 2024: 316 institutionsQ1 2025: 275 institutionsQ2 2025: 271 institutionsQ3 2025: 255 institutionsQ4 2025: 269 institutionsQ1 2026: 274 institutionsQ2 2026: 274 institutions
Value heldQ1 2022: $6.92B
Q1 2021: $5.08BQ2 2021: $5.75BQ3 2021: $7.32BQ4 2021: $9.09BQ1 2022: $6.92BQ2 2022: $3.64BQ3 2022: $3.00BQ4 2022: $2.89BQ1 2023: $2.77BQ2 2023: $1.65BQ3 2023: $1.45BQ4 2023: $2.10BQ1 2024: $2.63BQ2 2024: $2.96BQ3 2024: $3.10BQ4 2024: $2.60BQ1 2025: $1.40BQ2 2025: $1.51BQ3 2025: $911.3MQ4 2025: $1.65BQ1 2026: $1.51BQ2 2026: $1.19B
Institutions holding TNDM and their total value by quarter
QuarterHoldersValue
Q2 2026274$1.19B
Q1 2026274$1.51B
Q4 2025269$1.65B
Q3 2025255$911.3M
Q2 2025271$1.51B
Q1 2025275$1.40B
Q4 2024316$2.60B
Q3 2024332$3.10B
Q2 2024317$2.96B
Q1 2024291$2.63B
Q4 2023268$2.10B
Q3 2023226$1.45B
Q2 2023247$1.65B
Q1 2023274$2.77B
Q4 2022295$2.89B
Q3 2022299$3.00B
Q2 2022331$3.64B
Q1 2022379$6.92B
Q4 2021388$9.09B
Q3 2021338$7.32B
Q2 2021303$5.75B
Q1 2021290$5.08B

Institutions, Q1 2022

Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q4 2021.

Institutions holding TNDM in Q1 2022
InstitutionSharesValue% of portfolioChange in sharesAction
Tower Research Capital LLC (TRC)10,207$1.19M0.01%+3,612+54.8%Added
Weiss Multi-Strategy Advisers LLC10,000$1.16M0.03%+2,039+25.6%Added
Commonwealth Equity Services, LLC9,834$1.14M0.00%−90−0.9%Reduced
Brookfield Asset Management Inc.9,697$1.13M0.00%+3,972+69.4%Added
Virginia Retirement Systems Et Al9,500$1.10M0.01%+1,000+11.8%Added
Arrowstreet Capital, Limited Partnership9,491$1.10M0.00%+9,491New
Diametric Capital, LP9,500$1.10M0.61%+9,500New
Engineers Gate Manager LP9,128$1.06M0.04%−1,662−15.4%Reduced
Lattice Capital Management, LLC9,200$1.06M1.54%00.0%Unchanged
Ontario Teachers Pension Plan Board8,790$1.02M0.01%+3,792+75.9%Added
Manchester Capital Management LLC8,573$997.0K0.14%00.0%Unchanged
Teachers Retirement System of the State of Kentucky8,400$977.0K0.01%−600−6.7%Reduced
Zurcher Kantonalbank (Zurich Cantonalbank)8,264$961.0K0.00%−891−9.7%Reduced
Echo Street Capital Management LLC8,153$948.0K0.01%+8,153New
Public Employees Retirement Association of Colorado8,105$943.0K0.00%00.0%Unchanged
Greenwood Capital Associates LLC8,032$934.0K0.25%+344+4.5%Added
Mercer Global Advisors Inc7,908$920.0K0.01%+1,212+18.1%Added
AGF Investments LLC7,859$914.0K0.08%+7,859New
Oppenheimer & Co Inc7,848$912.0K0.02%+2,812+55.8%Added
Graham Capital Management, L.P.7,750$901.0K0.04%+7,750New
HighTower Advisors, LLC7,787$900.0K0.00%−408−5.0%Reduced
Jump Financial, LLC7,669$892.0K0.04%+7,669New
Wolverine Trading, LLC7,437$868.0K0.03%+7,437New
D. E. Shaw & Co., Inc.7,444$866.0K0.00%−11,478−60.7%Reduced
Twinbeech Capital LP7,350$855.0K0.04%+7,350New
Partners Group Holding AG7,331$853.0K0.04%+2,160+41.8%Added
Level Four Advisory Services, LLC7,158$832.0K0.07%+5,293+283.8%Added
Diversified Trust Co7,052$820.0K0.03%+825+13.2%Added
Cresset Asset Management, LLC6,829$794.0K0.01%−410−5.7%Reduced
Verition Fund Management LLC6,663$775.0K0.01%−301−4.3%Reduced
Dynamic Technology Lab Private Ltd6,580$766.0K0.09%+6,580New
Cambridge Investment Research Advisors, Inc.6,519$758.0K0.00%−500−7.1%Reduced
Tributary Capital Management, LLC6,400$744.0K0.06%−8,000−55.6%Reduced
ProShare Advisors LLC6,325$735.0K0.00%−1,007−13.7%Reduced
The PNC Financial Services Group, Inc.6,246$726.0K0.00%+164+2.7%Added
Ausdal Financial Partners, Inc.6,119$712.0K0.10%+610+11.1%Added
Donoghue Forlines LLC6,126$712.0K0.15%+1,941+46.4%Added
TrimTabs Asset Management, LLC6,126$712.0K0.24%+6,126New
Crossmark Global Holdings, Inc.6,030$701.0K0.02%+80+1.3%Added
Silvant Capital Management LLC6,011$699.0K0.13%00.0%Unchanged
Thoroughbred Financial Services, LLC5,968$694.0K0.11%+3,210+116.4%Added
Janney Montgomery Scott LLC5,665$659.0K0.00%−100−1.7%Reduced
Securian Asset Management, Inc5,652$657.0K0.01%−100−1.7%Reduced
Canada Pension Plan Investment Board5,616$654.0K0.00%+184+3.4%Added
JustInvest LLC5,574$648.0K0.03%+364+7.0%Added
Quantbot Technologies LP5,564$647.0K0.06%+5,079+1,047.2%Added
Captrust Financial Advisors5,484$638.0K0.00%+1,632+42.4%Added
Connacht Asset Management LP5,460$635.0K0.94%+1,359+33.1%Added
Zions Bancorporation, N.A.5,330$620.0K0.06%+1,545+40.8%Added
JB Capital LLC5,158$600.0K0.06%+477+10.2%Added
Schechter Investment Advisors, LLC5,057$589.0K0.05%−355−6.6%Reduced
Exchange Traded Concepts, LLC5,022$584.0K0.01%−2,814−35.9%Reduced
Glaxis Capital Management, LLC5,000$581.0K0.82%+5,000New
Brinker Capital Investments, LLC4,973$578.0K0.01%−99−2.0%Reduced
Maryland State Retirement & Pension System4,800$558.0K0.02%00.0%Unchanged
Tocqueville Asset Management L.P.4,600$535.0K0.01%00.0%Unchanged
Prudential Financial Inc4,572$532.0K0.00%−23,923−84.0%Reduced
Vontobel Holding Ltd.4,287$500.0K0.00%−1,000−18.9%Reduced
Gsa Capital Partners LLP4,017$467.0K0.06%+4,017New
WealthTrust Axiom LLC4,000$465.0K0.15%−1,000−20.0%Reduced
First Manhattan Co4,000$465.0K0.00%00.0%Unchanged
Paloma Partners Management Co3,993$464.0K0.04%+3,993New
Duality Advisers, LP3,767$438.0K0.05%+3,767New
Lyon Street Capital, LLC3,750$436.0K0.65%−4,250−53.1%Reduced
Versor Investments LP3,700$430.0K0.02%+2,285+161.5%Added
Campbell & CO Investment Adviser LLC3,611$420.0K0.11%+3,611New
Bluestein R H & Co3,513$409.0K0.02%00.0%Unchanged
Creative Planning3,413$397.0K0.00%+405+13.5%Added
Walleye Trading LLC3,409$396.0K0.01%+3,409New
Shelton Capital Management3,340$388.0K0.01%−6,848−67.2%Reduced
Sigma Planning Corp3,313$385.0K0.01%−301−8.3%Reduced
Utah Retirement Systems3,300$384.0K0.01%+100+3.1%Added
Profund Advisors LLC3,220$374.0K0.02%−468−12.7%Reduced
Northwestern Mutual Wealth Management Co3,202$373.0K0.00%+456+16.6%Added
Canal Capital Management, LLC3,000$349.0K0.09%+3,000New
Shell Asset Management Co2,802$326.0K0.01%+2,802New
Roundview Capital LLC2,746$319.0K0.03%−6,116−69.0%Reduced
Occudo Quantitative Strategies LP2,684$312.0K0.03%+2,684New
MML Investors Services, LLC2,668$310.0K0.00%+201+8.1%Added
Lazard Asset Management LLC2,616$304.0K0.00%+1,663+174.5%Added
Cetera Advisors LLC2,586$301.0K0.01%+2,586New
CIBC Asset Management Inc2,536$295.0K0.00%00.0%Unchanged
Keebeck Alpha, LP2,517$293.0K0.09%+660+35.5%Added
Laurel Wealth Advisors, Inc.2,432$282.0K0.02%−220−8.3%Reduced
Neo Ivy Capital Management2,280$266.0K0.24%+1,691+287.1%Added
Spearhead Capital Advisors, LLC2,198$256.0K0.03%−2,423−52.4%Reduced
Mackenzie Financial Corp2,200$256.0K0.00%+2,200New
American Trust2,163$252.0K0.02%+2,163New
Truist Financial Corp2,096$244.0K0.00%00.0%Unchanged
Los Angeles Capital Management LLC2,092$243.0K0.00%+112+5.7%Added
Appleton Partners Inc2,080$242.0K0.02%00.0%Unchanged
Western Wealth Management, LLC2,008$234.0K0.01%+2,008New
M&T Bank Corp1,995$233.0K0.00%00.0%Unchanged
Clarkston Capital Partners, LLC2,000$233.0K0.00%00.0%Unchanged
Bridgewater Advisors Inc.2,000$233.0K0.06%00.0%Unchanged
Mount Yale Investment Advisors, LLC1,946$226.0K0.02%−11−0.6%Reduced
Astrantus Ltd1,911$222.0K0.37%+1,911New
LVW Advisors, LLC1,782$207.0K0.04%+90+5.3%Added
Hightower 6M Holding, LLC1,769$206.0K0.02%+1,769New
Derbend Asset Management1,347$203.0K0.20%00.0%Unchanged